In other Unreal Engine news, Epic co-founder Mark Rein mentioned on Twitter yesterday that Epic had signed a “big new Unreal Engine 4 licensee” but couldn’t give details. (I assume it’s not Zynga.)

Rein also commented today that Unreal Development Kit – a free, revenue-share version of Unreal Engine – has reached 1.5 million installs. That’s a heck of a lot of novice, indie and hobby developers with access to one of the industry’s most respected toolsets.